Pneumatically sprung railway car truck

Claim 1

A railway vehicle truck for supporting a car body, comprising in combination, two transversely spaced side frames, two longitudinally spaced wheel-axle units each including an axle and two transversely spaced wheels rigidly secured thereto, bearings for the axles on the ends of the side frames providing limited resilient universal movement while preventing any substantial relative axial movement, longitudinally spaced transom bars connected between said side frames intermediate their length and providing weave between the side frames while preventing transverse separation and permitting longitudinal displacement of one side frame with respect to the other, vertical air springs disposed on said frames at their mid-length, horizontal air springs between said side frames and said bolster, a source of air pressure connected to supply air pressure to both said vertical and horizontal air springs, a bolster supported on air springs on said side frames at their mid-length, a king post connection between said bolster and a support on the car body, bearing supports for the sides of the car support on said bolster substantially forming a direct-load path through the springs to the side frames, and longitudinally swingable side stay anchor bars connected between said bolster and the side frames.